low mazda
+1y
an APC logo on the windshiled will net 100% HP... sorry i had too..
Best things for that engine as far as bolt on's is exhaust. from header all the way back.... I used GReddy on my prelude. I also turboed it and ran about 11 PSI. You can get a header, intake, high flow cat, muffler (cat back system), pulleys, new fuel rail, and thats about all your gonna get with bolt ons.
only big horsepower gains you are going to get is gonna be steering away from the b16 or adding something to get away from the natural aspiration.
Other options would be a dry nitrous kit..